NestedLineNumberTest.java revision 2942:08092deced3f 
1/*
2 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26/*
27 * @test
28 * @bug 8061778
29 * @summary  Wrong LineNumberTable for default constructors
30 * @modules jdk.jdeps/com.sun.tools.classfile
31 */
32
33import com.sun.tools.classfile.ClassFile;
34import com.sun.tools.classfile.ConstantPoolException;
35import com.sun.tools.classfile.Method;
36import com.sun.tools.classfile.Attribute;
37import com.sun.tools.classfile.Code_attribute;
38import com.sun.tools.classfile.LineNumberTable_attribute;
39import com.sun.tools.classfile.LineNumberTable_attribute.Entry;
40
41import java.io.IOException;
42
43public class NestedLineNumberTest {
44
45    public static void main(String[] args) throws Exception {
46        Entry[] lines = findEntries();
47        if (lines == null || lines.length != 1) {
48            int found = lines == null ? 0 : lines.length;
49            error(String.format("LineNumberTable contains wrong number of entries - expected %d, found %d", 1, found));
50        }
51
52        int line = lines[0].line_number;
53        if (line != 79) {
54            error(String.format("LineNumberTable contains wrong line number - expected %d, found %d", 79, line));
55        }
56    }
57
58    static Entry[] findEntries() throws IOException, ConstantPoolException {
59        ClassFile self = ClassFile.read(NestedLineNumberTest.Test.class.getResourceAsStream("NestedLineNumberTest$Test.class"));
60        for (Method m : self.methods) {
61            if ("<init>".equals(m.getName(self.constant_pool))) {
62                Code_attribute code_attribute = (Code_attribute)m.attributes.get(Attribute.Code);
63                for (Attribute at : code_attribute.attributes) {
64                    if (Attribute.LineNumberTable.equals(at.getName(self.constant_pool))) {
65                        return ((LineNumberTable_attribute)at).line_number_table;
66                    }
67                }
68            }
69        }
70        return null;
71    }
72
73    static void error(String msg) {
74        throw new AssertionError(msg);
75    }
76
77    // The default constructor in this class should get only one LineNumberTable entry,
78    // pointing to the first line of the declaration of class Test.
79    static class Test {
80        static class Empty { }
81    }
82}
83